The Subaru Coronagraphic Extreme AO Project

Details The Subaru Coronagraphic Extreme AO Project The Subaru Coronagraphic Extreme AO Project

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1158..319m&link_type=abstract

EXOPLANETS AND DISKS: THEIR FORMATION AND DIVERSITY: Proceedings of the International Conference. AIP Conference Proceedings, V

Physics

Optics

Substellar Companions, Planets, Adaptive And Segmented Optics, Space-Based Ultraviolet, Optical, And Infrared Telescopes, Optical System Design

Scientific paper

High contrast coronagraphic imaging is a challenging task for telescopes with central obscurations and thick spider vanes such as the Subaru Telescope. Our group is currently assembling an extreme adaptive optics (AO) bench designed as an upgrade for the newly commissionned coronagraphic imager instrument HiCIAO, that addresses these difficulties. The so-called SCExAO system combines a high-performance Phase Induced Amplitude Apodization (PIAA) coronagraph to a MEMS-based wavefront control system that will be used in complement of the Subaru AO188 system. We present and demonstrate the good performance of two key optical components that suppress the spider vanes, the central obscuration and apodize the beam for high-contrast coronagraphy, while preserving the throughput and the angular resolution.

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